81883473407999 has 4 divisors (see below), whose sum is σ = 82250663871936. Its totient is φ = 81516282944064.

The previous prime is 81883473407987. The next prime is 81883473408007. The reversal of 81883473407999 is 99970437438818.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81883473407999 is a prime.

It is a super-5 number, since 5×81883473407999⁵ (a number of 71 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81883473407909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183595231634 + ... + 183595232079.

It is an arithmetic number, because the mean of its divisors is an integer number (20562665967984).

Almost surely, 2^{81883473407999} is an apocalyptic number.

81883473407999 is a deficient number, since it is larger than the sum of its proper divisors (367190463937).

81883473407999 is a wasteful number, since it uses less digits than its factorization.

81883473407999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367190463936.

The product of its (nonzero) digits is 2633637888, while the sum is 80.

The spelling of 81883473407999 in words is "eighty-one trillion, eight hundred eighty-three billion, four hundred seventy-three million, four hundred seven thousand, nine hundred ninety-nine".